In　this　paper,　3D-Mn/MnOx　periodic　arrays　architecture　is　fabricated　through　a　facile　and　efficient　method.　A　femtosecond　laser　is　used　to　generate　a　3D　conductive　network　on　a　metallic　manganese　surface　which　also　serves　as　the　current　collector　(3D-Mn),　followed　by　chemical　oxidation　to　form　Mn2O3　and　MnO2　on　the　surface　of　the　3D-Mn.　Detailed　electrochemical　characterization　reveals　that　the　3D-Mn/MnOx　electrode　exhibits　good　rate　performance　and　cycle　life,　and　the　assembled　3D-Mn/MnOx　supercapacitor　can　deliver　the　highest　energy　density　of　5.6　mu　Wh/cm(2)　at　a　power　density　of　21.8　mu　W/cm(2).　The　enhanced　performance　is　attributed　to　the　unique　periodic　3D-Mn/MnOx　architecture　which　largely　increases　the　effective　electrode　surface　area,　shortens　the　electron/ion　transportation　distance,　facilitates　electrolyte　permeation,　and　reduces　the　contact　resistance　between　3D-Mn　and　MnOx.　Importantly,　MnOx　is　formed　directly　on　the　3D-Mn　surface,　which　helps　to　maintain　the　structural　integrity　and　mechanical　adhesion　between　each　other,　and　thus　is　beneficial　to　long-term　electrochemical　cycling.